Remove the memory card and then reinsert it. Make sure it's inserted in the correct direction and not at a slant.

Examples of how to insert the memory card:

HDR-CX675

DSC-TX30

[A] If you're using a MicroSD™ memory card, insert it with the printed side facing up until it clicks.[B] If you're using a Memory Stick Micro™ memory card, insert it with the terminal side facing up until it clicks.

Check if the memory card terminals are clean.

WARNING! There is a risk of software corruption. Don't touch the memory card terminals with your hands or any metal object.

Wipe dirty memory card terminals with a dry cloth or cotton swab.

If you're using a MicroSD or Memory Stick Micro memory card with an adapter:

Make sure that the memory card is inserted in the adapter correctly.

Try a different adapter or another memory card to isolate the issue.

Note:

If possible, use a full size SD™ or Memory Stick™ memory card instead of a MicroSD or Memory Stick Micro memory card with an adapter. MicroSD and Memory Stick Micro memory cards are recommended for the use in smaller devices like mobile phones or action cameras.